International Klein Blue

#0033BB

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color in 1957. What sets IKB apart is its remarkable saturation and intensity. Klein achieved this by suspending pure color pigment in a synthetic resin, maintaining the pigment's brilliance without dulling effects. This color is often perceived as conveying authority, importance, and confidence. In design, IKB is often used sparingly, as an accent, because it draws immediate attention. It also has the effect of visually 'advancing' towards the viewer. The color is not just visually striking but also has historical and artistic significance, representing Klein's exploration of infinity and immateriality.

The hex color #0033bb, also known as International Klein Blue, presents some accessibility challenges, particularly in web design. Its dark hue requires careful consideration when choosing text and background colors. To ensure readability, it's crucial to use contrasting colors. For instance, white or a very light yellow would provide sufficient contrast against #0033bb for text. A contrast ratio of at least 4.5:1 is recommended for normal-sized text and 3:1 for large text (14pt bold or 18pt regular) to meet WCAG AA standards. Avoid pairing #0033bb with other dark colors, as this will reduce visibility and make the content difficult to perceive for users, especially those with visual impairments. Using online contrast checkers can help determine if the color combinations meet accessibility guidelines. Additionally, consider providing alternative ways to convey information, such as using icons or descriptive text, to enhance accessibility for all users.

Shades

Digital Color Formats

RGB
0 51 187
RGB0 51 187
Red
Green
Blue
HSL
223.64 100% 36.67%
223.6410036.67HSL
Hue
Saturation
Lightness
HWB
223.64 0% 26.67%
223.64026.67HWB
Hue
Whiteness
Blackness
hex#0033BB
rgb0 51 187
hsl223.64 100% 36.67%
cmyk100% 72.73% 0% 26.67%
hwb223.64 0% 26.67%
xyz10.15 5.96 47.63
CMYK
100% 72.73% 0% 26.67%
10072.73026.67CMYK
Cyan
Magenta
Yellow
Key
XYZ
10.15 5.96 47.63
10.155.9647.63XYZ
X
Y
Z

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